Java Reference
In-Depth Information
The first output of this program demonstrates a
Path
for the folder containing this
chapter's examples. The second output demonstrates a
Path
for this example's source code
file. In both cases, we specified an absolute path.
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// Fig. 15.2: FileAndDirectoryInfo.java
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// File class used to obtain file and directory information.
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import
java.io.IOException;
import
java.nio.file.DirectoryStream;
import
java.nio.file.Files;
import
java.nio.file.Path;
import
java.nio.file.Paths;
import
java.util.Scanner;
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public class
FileAndDirectoryInfo
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{
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public static void
main(String[] args)
throws
IOException
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{
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Scanner input =
new
Scanner(System.in);
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System.out.println(
"Enter file or directory name:"
);
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// create Path object based on user input
Path path = Paths.get(input.nextLine());
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if
(
Files.exists(path)
)
// if path exists, output info about it
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{
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// display file (or directory) information
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System.out.printf(
"%n%s exists%n"
,
path.getFileName()
);
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System.out.printf(
"%s a directory%n"
,
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Files.isDirectory(path)
?
"Is"
: "
Is not"
);
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System.out.printf(
"%s an absolute path%n"
,
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path.isAbsolute()
?
"Is"
:
"Is not"
);
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System.out.printf(
"Last modified: %s%n"
,
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Files.getLastModifiedTime(path)
Files.size(path)
path
);
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System.out.printf(
"Size: %s%n"
,
);
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System.out.printf(
"Path: %s%n"
,
);
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System.out.printf(
"Absolute path: %s%n"
,
path.toAbsolutePath()
);
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if
(
Files.isDirectory(path)
)
// output directory listing
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{
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System.out.printf(
"%nDirectory contents:%n"
);
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// object for iterating through a directory's contents
DirectoryStream<Path> directoryStream =
Files.newDirectoryStream(path);
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for
(Path p : directoryStream)
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System.out.println(p);
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}
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}
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else
// not file or directory, output error message
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{
Fig. 15.2
|
File
class used to obtain file and directory information
. (Part 1 of 2.)
